Answer: C :}
Explanation: html stands for a programming language used to create websites and blogs.
A plural noun indicates that there is more than one of that noun (while a singular noun indicates that there is just one of the noun). ... Regular plurals follow this rule (and other similar rules), but irregular plurals are, well, not regular and don't follow a “standard” rule.
Noise I believe, since that is what is being escaped from by the hiker
