Which EL code snippet will insert this context parameter into the footer?

You have created a web application that you license to real estate brokers. The webapp is highly
customizable including the email address of the broker, which is placed on the footer of each
page. This is configured as a context parameter in the deployment descriptor:

Which EL code snippet will insert this context parameter into the footer?

A.
<a href=’mailto:${footerEmail}’>Contact me</a>

B.
<a href=’mailto:${initParam@footerEmail}’>Contact me</a>

C.
<a href=’mailto:${initParam.footerEmail}’>Contact me</a>

D.
<a href=’mailto:${contextParam@footerEmail}’>Contact me</a>

E.
<a href=’mailto:${contextParam.footerEmail}’>Contact me</a>

Explanation: