Answer:
b. turnaround time
Explanation:
A scheduling computer system refers to the ability of the computer that typically allows one process to use the central processing unit (CPU) while another process is waiting for input-output (I/O), thus making a complete usage of any lost central processing unit (CPU) cycles in order to prevent redundancy. 
In terms of CPU scheduling metrics, turnaround time is the time at which the job completes minus the time at which the job arrived in the system. It is one of the scheduling metrics to select for optimum performance. 
 
        
             
        
        
        
Dew forms on grass when the cold air form the night blends with the hot air from the morning therefore creating dew on grass
        
             
        
        
        
In sinusoidal functions or in waves, "phase" has two different, but closely related, meanings. One is the initial angle of a sinusoidal function at its origin and is sometimes called phase offset or phase difference. Another usage is the fraction of the wave cycle that has elapsed relative to the origin.
 
        
             
        
        
        
Answer
System restore
Explanation
System restore is a recovery feature that helps restore your system to the previous condition or point. Most computers have system restore disks which are an advantage to the users especially when the computer clashes.These disks are very effective when it comes to restoring the system to its initial state.