Avast increase in defense spending in recent years may be attributed to what events or changes

A vast increase in military spending can be attributed to the War on Terror (post 9/11) and the continued conflicts in Iraq and Afghanistan. The Syrian Civil War has also been a source of concern. Military spending can also be linked to anti-terror activities around the world.

b. after i get up in the morning,

explanation:

after is a subordinating conjunction that introduces a time clause. time clauses are dependent clauses used to indicate when something happened.

the clause "after i get up in the morning" tells when the action in the main clause (drinking a cup of coffee) happens:

"after i get up in the morning, i drink a cup of coffee." it is the most logical choice of all.