Which of the following does the administrator need to install to make the website trusted?

A server administrator has configured a web server. Which of the following does the administrator need to install to make the website trusted?
A. PKI
B. SSL
C. LDAP
D. DNS

Correct Answer: A
Explanation/Reference:
Explanation:
Reference:
https://www.csoonline.com/article/3400836/what-is-pki-and-how-it-secures-just-about-everything-online.html