Its the first one. Because its true, on average teens spend hours on their devices
The compound sentence would be choice A. Erin and Maria are going to the mall, and John is going to the movies. Hope this helps! ^_^
The adverb clause here is 'than we had predicted', and it refers to 'colder' which is the correct answer here.
Dante opposed the Ghibellines, who were in favor of the Holy Roman Emporer
Whom is the answer i think
