Which sentence best summarizes the article? A
Scientists are trying to make sure that no endangered species becomes completely extinct.

B
Scientists believe that 25 percent of all mammals and 10 percent of all bird species will be extinct within three decades.

C
Scientists want to preserve the DNA of endangered species in a frozen state, so they can later make clones of the animals.

D
The DNA, which determines an animal's characteristics, will be preserved at a very low temperature.

is there a passage to this question if so plz take a picture

the illustration   that would give a reader a clear understanding of the text is a picture of men constructing the frame of a building.the frame is made of iron bars. the text describes the job of blacksmiths'. these were very organised and they had different names: "the driver" and "the heater". the text describes the way in which these men worked ; they worked iron pieces as if they were playing a sport. in fact, the text wants to show the men's skills. the text also puts some emphasis on the use of '' rivets'' in construction. this kind of nails were not always used in the construction of manhattan.

some examples:

"and with an underhand toss he hurled the smoking rivet straight at the catcher, who caught it in mid-air in his catching can." men's skills

"when the driver was ready for a new " the emphasis on the rivet ( special nail used in construction).

" it against a beam to remove any cinders, and jammed it into the waiting hole. " the emphasis on the rivet.