Step 1: Understanding the Concept
The first trimester covers about the first 12 weeks, when most organs are formed.
Step 2: Check each point
(A) is true: limbs, fingers and toes form by about the end of the second month.
(C) is true: by the end of the first trimester the foetus can open and close its mouth and fists.
(D) is true: the CNS develops, and the excretory and circulatory systems begin to work.
(B) is false: the mother clearly feels movements around the fifth month, in the second trimester.
Step 3: Select the option
Statements (A), (C) and (D) are correct, which is option (D).
Final Answer:
Statements (A), (C) and (D) only occur in the first trimester.
\[ \boxed{\text{(D) }\text{(A), (C) and (D) only.}} \]