John hakupenda skating sana, lakini alipenda zaidi kuliko chaguzi zake zingine. Daktari alisema kwamba alihitaji kujitunza zaidi, na skating ilikuwa shughuli ambayo ilimfanya nini? 
Choose an answer to this question from the following options:

A: songa haraka
B: inaweza kuanguka
C: kuongezeka kwa kiwango cha moyo
D: majeraha
E: kumdhuru
The right answer is C