Read the theory box. Which of the topics (a-c) corresponds to

Read the theory box. Which of the topics (a-c) corresponds to a for-and-against essay?
a The most incredible experience Ive ever had.
b Whats the best way to learn vocabulary in English?
с Credit Cards: a curse or a blessing?
For-and-against essays are a type of discursive writing in which you discuss the advantages and disadvantages of a specific topic. A for-and-aqainst essay should consist of:
an introduction in which you present the topic, making a general remark about it without giving your opinion.
a main body in which you present the points for and the points against, in separate paragraphs, supporting your arguments with justifications/examples.
a conclusion which summarises the pros and cons and gives a balanced consideration of the topic In my opinion/view, I believe, I think etc.
For-and-against essays are normally written in a formal style; therefore, you should avoid using personal language (I know, I am sure , contractions (Ive got) and colloquial expressions or idioms (Whats up? .