COULD YOU GUYS PLEASE HELP ME!!! Question 1: Abstinence is the only method for preventing HIV, STDS and pregnancy that is__%

Options for #1:
A.) 70
B) 80
C) 90
D) 100
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Question 2: The most effective method of protecting yourself during sexual activity is a(n)___

Options for #2:
A) IUD
B) condom
C) diaphragm
D) cervical sponge
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Please help me ;-;