The correct choice would be "their." The sentence would read: "Before my lecture on good nutrition, neither of my uncles knew that chocolate-broccoli muffins were a good way to increase their intake of vitamin C." This is because "their" refers to both uncles collectively.
Before my lecture on good nutrition, neither of my uncles knew that chocolate-broccoli muffins were a good way to increase _____ intake of vitamin C.
? his
? their
1 answer