Which of the following are the correct null and alternative hypotheses for the test?

a. H₀: p = 0.48 vs. Hₐ: p ≠ 0.48
b. H₀: p = 0.48 vs. Hₐ: p > 0.48
c. H₀: p = 0.48 vs. Hₐ: p < 0.48
d. H₀: μ = 0.48 vs. Hₐ: μ < 0.48