Mark the letter A, B, C or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

a. Additionally, establishing marine protected areas where they can thrive undisturbed is crucial for their survival.

b. These sharks face threats such as overfishing and habitat degradation, endangering their populations.

c. Public awareness campaigns about the importance of preserving snaggletooth sharks and their role in maintaining marine biodiversity are also essential for supporting conservation measures.

d. Protecting the snaggletooth shark is imperative due to its vulnerable status in the marine ecosystem.

e. Conservation efforts involve implementing fishing regulations to prevent overexploitation of their populations.