Answer:
according to the passage
She knows Tucker might have been worried because Sammie was gone ( D )
Explanation:
Sammie's mother had to apologize to Tucker because Tucker must have been worried because he had to come see Sammie and Sammie's mother should have reminded him that his son won't be keeping the appointment due to another appointment she had with his son Sammie
It is necessary to always try as much as possible to keep the expectation of a friend in mind before scheduling a visit so as to make your friend happy and to make up for his/her lost time. Sammie and Tucker were friends in the passage.
