Answer:
Substitution
Explanation:
There are 3 types of mutations: deletions, insertions, and substitutions.
A deletion deletes one of the bases (AGTC), which can completely mess up the sequence and create a completely different protein.
An insertion inserts a new base into the strand, which can also completely mess up the sequence and create a completely different protein.
A substitution just changes one of the bases to a different base. This doesn't usually affect what protein is made, but when it does, it only changes one of the amino acids in the sequence, whereas the others change all of the amino acids in the sequence.
If the same protein is still created, then this person only experienced a substitution because it didn't affect the end result of the protein.
