The answer is B I just took the test
Monolith that's all I could think of I am studying that right now
I am pretty sure that you do not need to change something to make this sentence look better. Gramatically everything is totaly OK, so the last option - that's your answer. As you can see, <span> '[They] used tweezers to pick through innards looking for the heart' the previous tense is being used there, so any pronoun would be possible to use and that also would be proper.
</span>
Okay, there are 4 different kinds of structures for a sentence...
Simple, Compound, Complex, and Compound Complex.
You can use different clauses, independent and dependent.
You can use these sentences, combine them together, and make a strong sentence.