Answer: Hello! Apparently, your question is lacking the text to which it is based. Luckily, we were able to find it! The link to it is https://questioncove.com/updates/5c40e3765ce5b8758b5e7c00 . But be careful! The question above it is different from the one asked here, so focus only on the text itself. Here goes the answer to your question:
The correct alternative which explains the effect of the headings in this excerpt is alternative B, since many different aspects, such as production, nutrition, historical aspects and common sense facts are shown in it. They are very helpful due to the strategy used: explanations in a simple, direct way.
