Which of the following sentences uses a compound subject correctly? A.
Beth reads slowly, Kendall reads slowly.

B.
Beth and Kendall read slowly.

C.
Beth reads slowly with Kendall reading slowly.

D.
Beth reads slowly, but Kendall reads more slowly.

2times 15 is -30 and one times 5 is 5

The factors might be:
peer pressure
wanting to try new things
bad influences in group of friends
famous people doing things
social media showing wrong ideas

Betray, destroy, and obey do not need to be changed to add the suffix -ed, because the "y" at the end of each word is preceded by a vowel  (so  they would be spelled  "betrayed," "destroyed," and "obeyed").

but hurry is different; it has to  be spelled "hurried" because the "y" at the end of "hurry" is preceded by a consonant.