Reading Comprehension

Of the various constituents that are found in the human body, water occurs in the largest quantity. As a food substance, it is an extremely important feature of a person's diet. Its chief purpose is to replenish the liquids of the body and to assist in the digestion of food. Although nature provides considerable amounts of water in most foods, large quantities must be taken in the diet as a beverage. In fact, it is the need of the body for water that has led to the development of numerous beverages. Besides being necessary in building up the body and keeping it in a healthy condition, water has a special function to perform in cooking, as is explained later. Although this food substance is extremely essential to life, it is seldom considered in the selection of food, because, as has just been mentioned, nearly all foods contain water.

The larger work from which this passage was taken is most likely concerned with

A. health and diet
B. cooking
C. science essentials
D. multiple uses of water
E. different types of food

OA later

IMO D. But option D seems too generic and other options don't look good as well. What is the source ? ?

source: old ETS passage
OA and explanation: B /As the passage suggests, the point is to discuss how water has a special function in cooking. While health and diet seem important, as well as multiple uses of water, cooking is mentioned as the most significant topic, and the author states that it will be discussed later. /

I also selected D knowing it's vague, but couldn't touch even choice B, tricky

sam2304 wrote:IMO D. But option D seems too generic and other options don't look good as well. What is the source ? ?

A, i kept it as 2nd option. Eliminated B/E on the first look Is this the complete passage ? ? This seems too short even for a short passage.

I see that many passages in GRE section of 3000RC Pack are easy to understand but contain hard questions, a situation like this one.

how do I do to improve the situation? pls, help