It is c your answer for your questions
A frameshift mutation<span> (also called a framing error or a reading </span>frame shift<span>) is a genetic </span>mutation caused<span>by indels (insertions or deletions) of a number of nucleotides in a DNA sequence that is not divisible by three.</span>
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I've had this question before so i know the answer is:
<span>Mount st. Helens and the other cascade volcanoes are young, active volcanoes built on a continental margin above a sinking slab of oceanic plate.
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- Hannah ❤