某弹跳蛋白的截面积为30, (cm)^2，加270, (N)的力后长度为原长的1.5倍，则其杨氏模量为：A. 1.8 times 10^5, (N) / (m)^2B. 1.35 times 10^5, (N) / (m)^2C. 9 times 10^5, (N) / (m)^2D. 5.4 times 10^5, (N) / (m)^2

某弹跳蛋白的截面积为$30\, \text{cm}^2$，加$270\, \text{N}$的力后长度为原长的$1.5$倍，则其杨氏模量为：

A. $1.8 \times 10^5\, \text{N} / \text{m}^2$

B. $1.35 \times 10^5\, \text{N} / \text{m}^2$

C. $9 \times 10^5\, \text{N} / \text{m}^2$

D. $5.4 \times 10^5\, \text{N} / \text{m}^2$