Definition of grist
1a : grain or a batch of grain for grinding
b : the product obtained from a grist of grain including the flour or meal and the grain offals
2 : a required or usual amount
3 : matter of interest or value forming the basis of a story or analysis
4 : something turned to advantage or use —used especially in the phrase grist for one's mill
So your answer would be C, Corn meal
Traveling and tourism can be a hobby but it can also be a job, you can literally get an actual degree in this and travel,"Over 200 million people work in the travel and tourism industry worldwide. Our travel and tourism training is designed to give you the skills and knowledge to maximize career opportunities in this rapidly expanding industry. From entry-level travel agent basics to senior management for agencies or tour operations, each course leads to an IATA qualification, recognized internationally by the travel industry. "
Must have developed because you can think much better