It is a A. simple sentence, because there is only one main verb - opened.
A compound sentence has at least two independent clauses, a complex sentence has an independent clause and at least one dependent, a compound-complex clause sentence has two independent clauses and at least one dependent.
Answer: plastic 3-D printed hands are great for growing kids. There families can afford to buy new toys. Kids like the way they do and hands are easy to use A 3-D printer makes new hands by building up layers of toys.
Explanation:
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