39. Which of the following is not true?

A. Voiceless plosives at initial position followed by a vowel are aspirated.
B. Fortis stops at the beginning of a syllable are aspirated when followed by a stressed vowel.
C. Fortis plosives at final position may be released or unreleased.
D. Plosives at final position have the effect of shortening the preceding vowels.

Fortis stops at the beginning of a syllable are aspirated when followed by a stressed vowel is not true. In English, voiceless stops are aspirated at the beginning of a word and the beginning of a stressed syllable, not fortis stops. Fortis stops are characterized by increased tension or force.

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