"A character sketch is a description made for the purpose of guiding the writer on such assignments as introducing a particular character to the reader in such a way that both the writer and readers can have a quick overview of the character's attributes; including but not limited to physical appearance, idiosyncratic (individual) tendencies in different circumstances, state of mind as shaped by former experiences and how these will affect their future actions."
Option A: The first impression of a character always sticks with the reader. Hence it should fit with the character's personality in the rest of the story. For example, if the character is a grumpy, angry person at first, who suddenly becomes kind and caring at some point, the reader would get confused about that character. (Unless the plot involves a hidden personality of that character.) Hence option A is correct.
Option B: The last impression shouldn't fit the character's personality since it would confuse the reader. It is said that the first impression is the last impression (and not vice versa).
Option C: 'The actions of the character' will fit with the character's personality, unless there's a backstory given to it. There is no need for an obligation 'should' attached to it.
Hence options B and C are wrong.
Option D is wrong because there is a correct option 'A'.