Answer:
A lot of advice is available for people who want to form new habits for themselves.
Explanation:
Since the antecedent is plural, then the pronoun must be plural. People wishing to form new habits ought to be given a series of advice on how to go about it.
The answer is b. team.
The past participles battered and bruised are both intended to modify the noun team, the head of the noun phrase the football team which serves as the subject of the main clause.