1. He likes helping poor people. 2. It is good that he likes helping poor people. 3. I think it good that he likes helping poor
people. 3-1. I think it good for him to help poor people. 3-2. I think it good to help poor people. (Are the sentences all grammatical? I think as #1 and #2 are grammatical, the other sentences can be grammatical. Is that right?)
4. I believe it good that he likes helping poor people.
5. I feel it good that he likes helping poor people.
6. I consider it good that he likes helping poor people.
7. I find it good that he likes helping poor people.
8. I suppose it good that he likes helping poor people.
(I substituted other verbs for good. Are all the sentences grammatical?)
I believe it is A due to "The lady made detailed plans, engaged the caterer and the orchestra well in advance" isn't exactly connect well and be hard to understand so you'd put a comma between "caterer, and".