Answer:
b. If they want to defend their championship,the team must avoid mistakes..
Explanation:
You see,the option d might look the answer but it isn't, because the use of ";" refers to "or".
The sentence with an introductory phrase that is punctuated correctly is <em>B. If they want to defend their companionship, they must avoid mistakes.</em>
eruption of the Nevado del Ruiz stratovolcano in Tolima, Colombia, on November 13, 1985.
The answer is C