At Westonci.ca, we make it easy for you to get the answers you need from a community of knowledgeable individuals. Discover comprehensive answers to your questions from knowledgeable professionals on our user-friendly platform. Experience the ease of finding precise answers to your questions from a knowledgeable community of experts.

Data from measurements of the oxygen-18 to oxygen-16 ratio of Foraminifera fossils indicates that average deep-ocean temperatures over the past 50 million years have been
a. increasing
b. decreasing
c. staying about the same
d. varying