1. The adverb that modifies the verb is c) ever. Without it, it wouldn't be completely clear as to which time frame the speaker refers to. It may have been for example the last year, or in some other particular moment.
2. The adverb that modifies the verb is b) always. It adds to the sense of urgency of wearing a life jacket when rafting. Without it, the meaning of this sentence wouldn't be so precise.
B. Adjective parallel to adjective.
Definition of Flabbergasted
overwhelmed by amazement
Although Ted expected nice lodging on the cruise, he was flabbergasted when the steward escorted him to a two-bedroom suite.
Firefox, Google Chrome, Safari and Opera are some of the most famous web browsers. What are they, and what are they good for? They are, definitely, computer programs that help users visit, preview and interact with a website. Therefore, option B is your best answer.