Are typically comprised of a mix of and
a.)stocks; bonds; index fundsb.)bonds; index funds; mutual fundsc.)mutual funds; stocks; bondsd.)stocks; index funds; bonds

According to its definition, I think the correct answer should be like this: Mutual funds are typically comprised of a mix of stocks and bonds. So correct option is C.). Mutual funds is an investment vehicle funded by group of people. So it's nothing more than mix of stocks and bonds.

It is to persuade someone(make them think it’s is right ) to them understand why it is right