The following are context clues phrases in the passage examples and syntax
Answer:
Coriander (/ˌkɒriˈændər, ˈkɒriændər/;[1] Coriandrum sativum) is an annual herb in the family Apiaceae. It is also known as Chinese parsley, dhania or cilantro (/sɪˈlæntroʊ, -ˈlɑːn-/).[2] All parts of the plant are edible, but the fresh leaves and the dried seeds (as a spice) are the parts most traditionally used in cooking.
'A U.S. Engineer' would more than likely be referring to the fact that they ride/control locomotives.
It's C or D I am not sure, either. But I might say it's C
