By 1914, Fawcett, ___ to formulate ideas, based on his research, about a legendary lost city he named Z. In 1925, he ___ a three-man team that included his son Jack into Brazillian jungle to find the lost city of Z.
A. has begun / leads
B. had begun / led
C. begins / has led
D. was beginning / was leading
E. was going to begin / led

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Identify the correct use of commas in a compound-complex sentence.
A. Although it was raining, she went for a walk, and she enjoyed the fresh air.
B. Although it was raining she went for a walk, and she enjoyed the fresh air.
C. Although it was raining, she went for a walk and, she enjoyed the fresh air.
D. Although it was raining, she went for a walk and she enjoyed the fresh air.