Answer asap! must be correct! a lot of points are given!

which sentence is a complex sentence?

a. the handle of that mug has cracked.

b. the tree groaned and swayed; then it toppled to the ground.

c. except for lonnie, everyone in the family eats meat.

d. since nobody was at home, we decided to return another day.

From what I can see here, it looks like there is more than one answer but if you only need one answer, then the best bet would be letter C. Except for Lonnie, everyone in the family eats meat. As said earlier, complex sentences have one independent clause and one dependent. The independent clause is "Everyone in the family eats meat while the dependent clause here would be "Except for Lonnie" since that clause cannot stand on its own. 

this is the english subject

Explanation: