behave in a way so as to belittle or degrade....
Do you have a picture of the passage? or maybe you could type it out?
B, because the period is ALWAYS outside of the parentheses, and there is no comma.
An infinitive phrase will begin with an infinitive [to + simple form of the verb]. It will include objects and/or modifiers. Here are some examples:
<span>To smash a spiderTo kick the ball past the dazed goalieTo lick the grease from his shiny fingers despite the disapproving glances of his girlfriend Gloria</span>
They can help you further understand the text<span />