Answer : 1. "A"
Explanation :

good will replace better because - the pattern used with as — as (Adv.) is as follows : as + Adj. (in Positive Degree) + as good → Positive Degree (no comparison is made) better → Comparative Degree (two things are compared) best → Superlative Degree (more than two things are compared) as — as  → used for expressing similarity between one person/thing and another. Look at the examples given below : Shyam is as rich as Ram. He does not play as well as his sister. Hence, These days, job opportunities are not as good is the right usage.