• "Extend" means to prolong or lengthen, and it is the most suitable term when referring to a deadline.
• "Increase" and "enlarge" are more commonly associated with quantity or size and are not typically used to describe extending a deadline.
• "Broaden" means to widen in scope, and it doesn't convey the idea of extending a specific time limit.

• "Alter" means to make changes or modifications. In this context, it's used to convey the idea of adjusting or changing the outfit to accommodate the person's change in weight.
• "Altar" refers to a raised structure or platform used for religious or ceremonial purposes.
• "Ultra" means beyond, extreme, or excessive, and it doesn't fit the context.
• "Utter" means to speak or express, and it doesn't convey the idea of making changes to an outfit in this context.

"Scent" refers to a pleasant or distinctive smell, especially a pleasant fragrance or aroma. It is the appropriate term to describe the quality of the French perfume in this context.

The other options, "sent," "send," and "cent," have different meanings. "Sent" is the past tense of the verb "send," "send" is a verb meaning to dispatch or transmit something, and "cent" is a unit of currency. None of these fit the context of describing the quality of a perfume.