In a sample of 70 self-driving cars in Pittsburgh, only 23 are fully autonomous (level 5 automation). Calculate the standard error of the proportion of fully autonomous vehicles and choose the correct answer from the list of option below. NB: Roundoff your answer from the proportion to two decimals and the standard error to four decimals.

• A.

0.0488

• B.

0.0502

• C.

0.0559

• D.

0.0586

• E.

0.0562