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This two-blank question requires understanding the critical tone of the passage.
Blank (i): The agency never defined “untenable risk,” leaving it without a firm standard. This absence of a standard made it open and vulnerable to outside influence. Susceptible to means vulnerable or open to — exactly right. “Unaware of” doesn’t explain the influence, and “irritated at” changes the meaning entirely.
Blank (ii): Experts reacted negatively to the agency’s poor decision. They would pan it — meaning to criticize harshly. “Complimented” is the opposite, and “overlooked” means to ignore, not to criticize.
Correct Answers: Blank (i) = A (susceptible to), Blank (ii) = E (panned).
Resistivity ($\rho$) is the reciprocal of conductivity ($\sigma$).
$\sigma = ne\mu_e$
Given: $n = 10^{19} \text{ m}^{-3}$, $\mu_e = 1.6 \text{ m}^2/\text{Vs}$, and $e = 1.6 \times 10^{-19} \text{ C}$.
$\sigma = 10^{19} \times (1.6 \times 10^{-19}) \times 1.6 = 1.6 \times 1.6 = 2.56 \ \Omega^{-1}\text{m}^{-1}$.
$\rho = \frac{1}{\sigma} = \frac{1}{2.56} \approx 0.39 \ \Omega\text{m}$.
The closest value provided is $0.4 \ \Omega\text{m}$.
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