Select all that are true of simple sentences:

Are short in length

Contains one or more subject and verb sets

Contain one or more subordinate clauses

May contain phrases

Contain one independent clause

Are long in length

Contain two or more independent clauses

Require coordinating conjunctions

Require subordinating conjunctions or relative pronouns

The correct answers are that simple sentences:

are short in length

contain one independent clause

may contain phrases

Explanation:

A sentence is a group of words that contains a subject and a predicate, is complete within itself, is used to ask a question, give a command, make a statement or give an exclamation. There are majorly types of sentences and they are; simple sentence, compound sentence, complex sentence, complex-compound sentence and sentence fragments.

For a sentence to be considered to be simple, it must fulfill certain criteria which includes;

a. it contains one independent clause and no dependent clauses; for example in the sentence; 'I walk', there is an independent clause (I walk to the market) and no dependent clause, hence it is a simple sentence, but if written like this; 'I walk to the market when it is not raining', the clause 'when it is not raining' is a dependent clause, because its full meaning is gotten when it is joined to the first clause; 'I walk to the market'

b. a simple sentence has an independent clause which contains subject and a predicate. A predicate is a phrase of more than one word, containing a verb. For example, 'The cows walked to the field'. 'The cows' is the subject, while the predicate is 'walked to the field'.

c. a simple sentence consist of an independent clause, having a subject and may contain a compound predicate. For example, 'In the house, parrot flies around and makes a lot of noise, the subject is ' the parrot', while the compound predicate is; 'flies around and makes a lot of noise'

I recommend you read the other types of sentences to get complete understanding of different types of sentences.