The methods in context question is one of the hardest questions there is. I use the same structure for this as you would in the AS 16 mark question. PGRAVE. To get used to this, refer to the 16 mark question first.
The first way you approach this question is by using the same structure as the 16 mark question, exploring advantages and disadvantages for PGRAVE. You should have two ads and dis' for your Practical and Ethical paragraph and one for the rest. This essay should come to two and a half pages at most.
I always tell student to start with a plan. You should have a table for your PGRAVE with four columns. "Advantages", "Disadvantages", "Contextualisation" and "Alternative Research Method". Your first two columns copy your 16 mark question as stated. Your contextualisation should answer the questions below. Your last column should talk about another research method which is better and explore why. Ideally, you should have one predominant alternative research method which is the answer for more than one. This will become your conclusion where you can say "overall, as you can see, Questionnaires are a better alternative because it offers higher validity and reliability".