Answer: File History
Explanation: File history is the history that gets created in the form of back-up that keeps the record of the stored files. It is used in protecting the files  that is present on the system like desktop, libraries,etc.
It creates the duplicate records in the storage for any future use and it can also be restored easily.File history also facilitates with feature of deleting the unnecessary history afterward when the user wants.
 
        
             
        
        
        
Answer:
Here you go, Change it however you'd like :)
Explanation:
import random as r
def play_round(p1, p2):
    cards = [1,2,3,4,5,6,7,8,9,10,"J","Q","K","A"]
    play1 = r.choice(cards)
    play2 = r.choice(cards)
    
    while play1 == play2:
        play1 = r.choice(cards)
        play2 = r.choice(cards)
    
    if cards.index(play1) > cards.index(play2):
        return f"{p1}'s Card: {play1}\n{p2}'s Card: {play2}\nThe Winner is {p1}"
    else:
        return f"{p1}'s Card: {play1}\n{p2}'s Card: {play2}\nThe Winner is {p2}"
print(play_round("Bob","Joe"))
 
        
             
        
        
        
Answer:
B. Bluetooth technology. 
Explanation:
A hardware platform can be defined as a collection of hardware such as an input hardware and output hardware device that are compatible with each other and the software application or program to be executed. All hardware platforms have their respective low level or high level machine language that are compatible with the software application. Some examples of a hardware devices are speakers, monitor, x86, i860, keyboard, MIPS, scanner, central processing unit (CPU) video game consoles (joysticks), IBM Z, ARM, unisys, powerpc, SPARC etc.
Generally, all hardware devices are connected with one another through the use of a wire such as cables or wirelessly such as Bluetooth, infrared etc. 
Hence, not all hardware is connected with wires, some hardware might be connected wirelessly with Bluetooth technology.
A Bluetooth technology can be defined as a wireless standard used for transmitting and receiving data over a short-range of distance. Therefore, the operating radio frequency of a Bluetooth technology is 2.45 Gigahertz and for a distance of about 10 meters (30 feet). 
 
        
             
        
        
        
Explanation:
private void btnDelete_Click(object sender, EventArgs e)
{
 if (this.dataGridView1.SelectedRows.Count > 0)
 {
 dataGridView1.Rows.RemoveAt(this.dataGridView1.SelectedRows[0].Index);
 } 
}