When Jacob starts running, his legs move faster and his heart rate increases. Which types of muscles are involved in these changes?

Skeletal muscles control his leg movement and smooth muscles control his heart rate.
Skeletal muscles control his leg movement and cardiac muscles control his heart rate.
Smooth muscles control his leg movement and cardiac muscles control his heart rate.
Skeletal muscles control both his leg movement and heart rate.

Read the excerpt from "politics and the english language" by george orwell. by this morning’s post i have received a pamphlet dealing with conditions in germany. the author tells me that he "felt impelled” to write it. i open it at random, and here is almost the first sentence that i see: "[the allies] have an opportunity not only of achieving a radical transformation of germany’s social and political structure in such a way as to avoid a nationalistic reaction in germany itself, but at the same time of laying the foundations of a cooperative and unified europe.” which statement is correct? orwell uses an example and statistical evidence in this excerpt. orwell uses an example and a quotation for evidence in this excerpt. orwell uses hypothetical and factual evidence in this excerpt. orwell uses hypothetical and statistical evidence in this excerpt.