Using the drawing of mRNA below, choose the letter that BEST fits the description. 
The 5 UTR corresponds to region:
Definitions:
Risk Free Rate
The theoretical rate of return of an investment with zero risk of financial loss, often represented by the yield on government bonds.
Beta
A measure of a stock's volatility in relation to the overall market; a beta greater than one indicates higher than market volatility.
Flotation Costs
Expenses incurred by a company in issuing new securities, including underwriting, legal, and registration fees, reiterating the cost aspect of raising equity or debt.
Retained Earnings
The portion of a company's net earnings not paid out as dividends but retained by the company to be reinvested in its core business or to pay debt.
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