60 people with smartphones were surveyed. 25 of those sampled said that they would always or nearly always use their smartphones on public transport. Calculate a 95% confidence interval to estimate the proportion of all smartphone users that always or nearly always use their smartphones on public transport. Select one:

a. (0.4918, 0.5082)

b. (0.2919, 0.5414) c. none of these options

d. (0.4087, 0.4246)

e. (0.2894, 0.5440)