Are Canadians Getting Fatter? Researchers Interested in This Question Take $\mathrm { H } _ { 0 }$

Are Canadians getting fatter? Researchers interested in this question take a random sample of 500 people and record an average weight of 190 pounds.Ten years ago,the average weight was 185 pounds.

A) $\mathrm { H } _ { 0 }$ : ? = 185 $\mathrm { H } _ { \mathrm { A } }$ : ? ? 185
B) $\mathrm { H } _ { 0 }$ : ? = 185 $\mathrm { H } _ { \mathrm { A } }$ : ? < 185
C) $\mathrm { H } _ { 0 }$ : ? = 185 $\mathrm { H } _ { \mathrm { A } }$ : ? > 185
D) $\mathrm { H } _ { 0 }$ : ? = 190 $\mathrm { H } _ { \mathrm { A } }$ : ? > 190
E) $\mathrm { H } _ { 0 }$ : ? = 190 $\mathrm { H } _ { \mathrm { A } }$ : ? < 190