Will upvote every answer! multiple choice question!

at construction sites, workers often reduce erosion by

a. moving excess sediment back to its original location c. planting trees b. spraying water on bare soil d. all of the above

You are given the first four terms of an arithmetic sequence. why might you use a recursive formula? why might you use an explicit formula? under what conditions might a recursive formula be preferred over the explicit formula? under what conditions might an explicit formula be preferred over the recursive formula? pleasss ! sorry if it's a long question: (