Guys help me understand the answer to the verbal sec 1 Q3 from the gregmat full practice test 1

this is my choice

and the answer

even when I go through the solution video I am not sure I understand the reasoning behind choosing 5.

Hi,

Where is the option to practise the full length practise test? I cannot find it. It would be great if you could help…

i followed the link from day 7 of the 1month plan.
u can find it there