Which of the following is a complex sentence?

Question

1. The government will not take action, and some citizens disagree.
2. Though the government will not take action, some citizens disagree.
3. Though the government will not take action, some citizens disagree, and some allies agree.
4. The government will not take action.

Answer 1

1 clause = simple sentence
2 clauses joined by one of the FANBOYS conjunctions = compound sentence
2 clauses with a subordinating conjunction at the beginning of one of them = complex sentence
3 clauses = Compound-complex = a combination of the last two above.

So you think … ?

Answer 2

I've never liked FANBOYS.
"For" means "because," so it should be a subordinate conjunction.