The answer to this question is B
MS Excel is a spreadsheet programme developed by Microsoft in 1985, with the sole purpose of helping businesses compile all their financial data, yearly credit, and yearly debit sheets. Fast forward to the future after 31 years, it is now the most commonly used program for creating graphs and pivot tables.
RAID5
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Gray wolves are endangered. They should be preserved because they are key to a 'healthy' ecosystem, in the sense that they help to keep populations of deer and elk in check. Also, the carcasses of their pray help to redistribute nutrients and provide food for other wildlife species.
I hope this helps! :)