Which of the following is true about css? a. a seperate css file is needed for each html file in a website. b. it is a language used to customize web pages based on user preferences. c. it is contained in a seperate file than html files. d. it is used to combine formatting information and content into one single file. in the following piece of css code, what is the rule? p { color: #676767 } a. #676767 b. color c. p d. p { color: #676767 } what is the following an example of? p { color: $676767 } a. property b. rule c. selector d. value in the following pieces of css code, what is body called? body { color: # } a. property b. rule c. selector d. value in the following piece of css code, what is the property selector? body { body: # baclground-color: #525252 font-family: arial, "lucida console", sans-serif } a. body b. background-color c. color d. font-family