Question

The car racing.....at 10 am next Friday.
А is starting
В starts
С will start

Answer 1

The car racing В starts at 10 am next Friday.

А is starting

В starts

С will start

Answer 2

The car racing will start at 10 am next Friday.

правильный вариант - c

т.к. "next" - это вспомогательное слово будущего времени)