It should be hablé since if it talking about someone else. If it were to be you, however, the sentence would be “Yo hablo con Juan.” Comprende?
Answer:
Supe que mi abuelo conocio al presidente de Ecuador.
Explanation:
Answer: Mi padre sugiere que yo coma fruta
Explanation: sugerir calls for the next verb to fall into the subjunctive
Of course its gonna be B.
¿Te gustan los dulces?
It says Do you like the sweets?
Hope this helps