根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
71 Scientists and experts have proved the uniqueness of fingerprints and discovered that no exactly similar pattern is passed on from parents to children, though nobody knows why this is the case．
The ridge（隆起） structure on a person’s fingers does not change with growth and is not affected by surface injuries．Burns, cuts and other damage to the outer part of the skin will be replaced in time by new one, which bears a reproduction of the original pattern． 72 Some criminals make use of this fact to remove their own fingerprints but this is a dangerous and rare step to take．
Fingerprints can be made very easily with printer’s ink．They can be recorded easily．
73 Because of the simplicity and economy of this system, fingerprints have often been used as a method of solving criminal cases．A suspected man may deny a charge but this may be in vain． 74
When a suspect leaves fingerprints behind at the scene of a crime, they are difficult to detect with the naked eye． 75 Some of the marks found are incomplete but identification is possible if a print of a quarter of an inch square can be obtained．
A．Special techniques are used to “develop” them．
B．A fingerprint is an impression of the friction ridges of all part of the finger．
C．It is only when the inner skin is injured that the arrangement will be destroyed．
D．With special methods, identification can be achieved successfully within a short time．
E．A latent（隐约的）print is the chance reproduction of the friction ridges deposited（沉淀）on the surface of an item．
F．His fingerprints can prove who he is even if his appearance has been changed by age or accident．
G．Every human being has a unique arrangement of the skin on his fingers and this arrangement is unchangeable．
知识点：七选五
GCDFA