By saying that “Thank you so much for doing that . As you can see, Mark treasured it.” , Mark ’ s mother means ______.
A.
Mark treasured his happy memory in the Math lessons.
B.
Mark treasured the relationship with his classmates and teachers.
C.
Mark treasured the appreciation from his classmates and was grateful to the author for doing that.
D.
Mark treasured the knowledge that he learned from Math lessons and found it useful in his daily life.