Which statement best describes the level of the sea now compared with 20,000 years ago (at the peak of the last glacial period or glaciation known as the Tioga glacial advance in California)?

a. Sea level was lower than it is today due to less ice was on land, and rivers flowed in what are now estuaries
b. Sea level was higher than it is today due to ice on land and was flooding low-lying areas
c. Sea level was the same as it is today
d. Sea level was lower than it is today due to ice on land, and rivers flowed in what are now estuaries
e. Sea level was higher than it is today due to less ice on land and was flooding low-lying areas
f. Sea level has high but falling steadily as glaciers continued to grow