Identify the choice that best describes the sentence

Halley's comet should return in the year 2061.

simple

compound

complex

compound-complex

simple

Explanation:

Simple sentence has one subject and one verb. e. g. I am going to visit a doctor on Saturday.

Compound sentence includes two separate sentences which are connected with a conjunction. e. g. I enjoy watching drama movies, but my sister hates them.

Complex sentence is made of two clauses, one dependent clause and one independent clause. e. g. because I was in a hurry, I had to travel by plane.

The sentence 'Halley's comet should return in the year 2061', is a simple sentence.