Mark should invest in safe and readily available that is: C. a savings account.
<h3>What is a savings account?</h3>
A savings account can be defined as a type of account that is held by an accountholder, which avails him or her an opportunity to deposit and withdraw money while providing principal security with a modest interest rate.
This ultimately implies that, the money invested in a savings account is safe and readily available to an accountholder such as Mark.
