Essentially this is a strengthen question. We're supposed to strengthen the resource-procurement hypothesis. Which added fact would argues in favor of the resource-procurement model?
(A) CORRECT. The resource-procurement model propsoess that woodland clearings were conducted for food procurement (line 1-4), therefore if we find evidence of food processing, that this hypothesis is supported.
(B) Incorrect. Out of scope. The population of interesting is the Mesolithic group who lived 7000-12000 years ago. Nothing about premodern population is relevant here.
(C) Incorrect. Even if clearings is an effective means of attracting grazing animals, it would not lead us to conclude that the Mesolithic people did it for this purpose.
(D) Incorrect. Nothing here to shed light on the purpose of man-made clearings by the Mesolithic people.
(E) Incorrect. Sort of similar as D, it reveals nothing about the Mesolithic people's intention.