Answer:
B. #
Explanation:
Every preprocessing directive must begin with the # character.
For example:
#define : Used to define a macro
#ifndef : Conditional evaluation of macro
#include : Used to include other preprocessor header file as part of the code
As we can see each of the directives begins with the # character. This is a signal to the preprocessor to interpret the subsequent keyword as a directive.
Answer:
Amazon. Founded in the US in 1994, Amazon started as an online bookstore that later diversified to products including media, electronics, apparel, furniture, food, toys, and jewelry.
eBay. ...
Walmart. ...
Etsy. ...
Home Depot. ...
Target. ...
Best Buy. ...
Wayfair.
Here are some of the computers used in the first generation of computers:
ENIAC
EDVAC
UNIVAC
IBM-701
IBM-650
These are some of the first computers ever that led to today's computers.