#3 with question.
brainliest + 10 : d

I think it is the first one! When you plug in -7 as ^an, it follows the sequence #1.
Example: a1 = 7    an = 2 + an

you would do this:

first term = 7, second = 7+2 = 9, third = 9+2 = 11,

Get it?

This is too long-standing now get out