Jose has a limited AdWords budget and his ads aren‟t showing as often as he wants. How might he improve results without spending more money on the campaigns limited by budget?

Jose has a limited AdWords budget and his ads aren‟t showing as often as he wants. How might he improve results without spending more money on the campaigns limited by budget? 

A) Slightly raise bids
B) Replace his 3 most expensive keywords with lower-prices keywords
C) Slightly lower bids
D) Choose accelerated instead of standard delivery