Which sentence correctly uses parallel structure select each correct answer more than one answer may be correct

1. When things go wrong, Carl tends to brood for hours and to blame others.

3. The school was closed not only because of the snow and ice but also because of the lack of heat

4.  The ice was a greater problem for the electrical power company than for the natural gas company.

Explanation:

Parallel structure refers to sentences constructions that have two or more words, phrases or clauses that are grammatically similar or identical in their structure. It is often used to show that the ideas with the same grammatical form (or structure) are equally important, to give a natural flow to the reading and to make it easier to process.

Sentence 1: When things go wrong, Carl tends to brood for hours and to blame others uses parallel structure because it uses the infinitive verb twice: to brood and to blame.

Sentence 3: The school was closed not only because of the snow and ice but also because of the lack of heat is also correct because it has two phrases with the same grammatical form: because of the snow and ice and because of the lack of heat.

Lastly, in the sentence 4: The ice was a greater problem for the electrical power company than for the natural gas company, the phrases the electrical power company and the natural gas company use parallel structure too.

i would have to say "a" or "d".

mark twain, real name samuel langhorne clemens, was an american writer, humorist, entrepreneur, publisher, and lecturer. among his novels are the adventures of tom sawyer and its sequel, the adventures of huckleberry finn, the latter often called "the great american novel". wikipedia