Final answer:
To reduce ambiguity in the sentence, replace 'one' with 'it' after 'Today Show' to make clear that the show is the source of the statement on hair brushing and baldness.
Step-by-step explanation:
The sentence “I was just watching the Today Show, and one said that brushing your hair 100 times per day can cause baldness” contains a pronoun “one” that is ambiguous. It is not clear who or what “one” refers to. The goal is to replace the ambiguous noun with one that best reduces that ambiguity. To resolve this, the noun “Today Show” should be used instead of “one.” The revised sentence would then read, “I was just watching the Today Show, and it said that brushing your hair 100 times per day can cause baldness.” By doing so, we clarify that the statement about hair brushing and baldness came from the Today Show, not from a person or another undefined source.