?Which version of Extensible Hypertext Markup Language (XHTML) is not backward compatible with HTML?

You are tasked with setting up a Linux bastion host for access to Amazon EC2 instances running in your VPC. Only clients connecting from the corporate external public IP address 72.34.51.100 should have SSH access to the host. Which option will meet the customer requirement?

A. Security Group Inbound Rule: Protocol - TCP. Port Range - 22, Source 72.34.51.100/32 B. Security Group Inbound Rule: Protocol - UDP, Port Range - 22, Source 72.34.51.100/32 C. Network ACL Inbound Rule: Protocol - UDP, Port Range - 22, Source 72.34.51.100/32 D. Network ACL Inbound Rule: Protocol - TCP, Port Range-22, Source 72.34.51.100/0

What statement regarding operator precedence is accurate?

A. Multiplication, division, and addition always take place prior to the calculation of a remainder. B. Operations that are placed in parentheses are evaluated first. C. Operations are always evaluated left to right, regardless of the expressions. D. Addition and subtraction operations are evaluated first.