跪求英语牛人来翻译！！！

基本句 the hypothesis that in painting the animal the cave artist painted a chiru.
这假设 : "在绘画那动物时, 那个洞穴艺术家一定是在画一只藏羚羊"
the animal像什麼? the animal resembles a chiru ==> the animal that resembles a chiru
艺术家与藏羚羊有何关系? she or he was familiar with the chiru ==> with which she or he was familiar

整句可翻译为
下述的选项, 如果确有其事, 最足以支持这假设 : "在绘画那只(现在看来酷似藏羚羊)动物时, 那个洞穴艺术家一定是在画一只他／她所熟悉的藏羚羊"
28. A group of paintings made approximately 15,000 years ago in a cave in the Loire River valley in what is now France depicts a number of different animals. One of the animals depicted seems to resemble the chiru, a rare antelope of the Himalayas.
Which of the following, if true, best supports the hypothesis that in painting the animal that resembles a chiru the cave artist painted a chiru with which she or he was familiar?
(A) There are numerous representations of imaginary animals in cave paintings of similar age.
(B) Fossilized remains of a chiru, approximately 16,000 years old, have been found at the northern end of the valley.
(C) The cave that contains the depiction of an animal that resembles a chiru contains stylized representations of plant life.
(D) Older caves from the same region contain no representations of animals that resemble a chiru.
(E) The antlers of the animal in the painting are longer than those of the mature Himalayan chiru.
下述的选项, 如果确有其事, 最足以支持这假设 : "在绘画那只(现在看来酷似藏羚羊)动物时, 那个洞穴艺术家一定是在画一只他／她所熟悉的藏羚羊"
p.S. 我认为原文不是好的英文!

假设在画动物，类似于一个藏羚羊洞穴画家画了她/他所熟悉的一只藏羚羊。

看中文意思你自己理解吧，我不知道怎么给你解释

画中的动物与洞穴中的藏羚神似，这个假设源于画家在绘画中对藏羚勾勒的熟悉。

假设在画动物，类似于一个藏羚羊洞穴画家画了一只藏羚羊，她或他是熟悉的