Which sentence does not have an error in subject and verb agreement?
a.
many of those clothes she are selling are too expensive.
b.
everyone at the assembly, including the principal, think the program was good.
c.
most of the people in my neighborhood likes to get together for barbecues.
d.
lemonade and iced tea mixed together is a refreshing drink.

The sentence that does not have an error in subject and verb agreement is, "Lemonade and iced tea mixed together is a refreshing drink". As you notice it, the subject of the sentence is "lemonade and iced tea", but takes the singular form of the verb. It is because the words "lemonade and iced tea" only refers and describes one thing, which is the word "drink". 

Venom, snakes? if that’s what your asking?

Aindependent clause should follow the dependent clause