In 1848, San Francisco Bay looked much different than it does today. At one time, the largest part of this estuary had an area defined by approximately_______ . 
A) 40 × 50 mi
B) 20 × 40 km
C) 30 × 80 km
D) 15 × 40 km
E) 40 × 150 mi
Correct Answer:
Verified
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