Answer:
Professional but inquisitive
Explananation:
Diane wants to do business with them but she doesn't want to come across as desperate s she acts professional but still acts her if they want to do business with her.
Answer:
USP
Explanation:
The United States Pharmacopeial Convention (USP) is an organisation which was founded in 1820. The USP aims that the consumers revived the good quality food and supplements which ensures the health of the consumer.
So when we buy a dietary supplement and medicine we look for the USP mark which indicates that the ingredient is present according to the label and are dissolved in the specified time and that the product has been prepared in the well sanitary conditions.
Thus, USP is correct.