The correct sentence is (A). In this example the author stablishes a good parallel structure when he/she enumerates the items. Commas must not be used in an independent clause; in particular, before a verb (the comma before “were” is not correct as an example B).
.
Answer:
B it is often true but not true
13x + 16y = 58
10x + 19y = 58
5x + 13y = 58
15x + 15y = 58
17x + 12y = 58
Answer:
A. Establishing roads and park facilities.
B. Attempting to protect Yellowstone park.
Explanation:
Yellowstone Park was established in 1872. In this year, the first superintendent of the park was appointed. This was Nathaniel P. Langford. The second superintendent was Philetus W. Norris (1877-1882). These two early superintendents were essential to the sucess of the park. They were responsible for the establishment of roads (which remain as the Grand Loop Road) and basic facilities. They also campaigned against hunters, vandals, squatters and poachers.
Explanation:
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