Adeveloper creates a new visualforce page and apex extension, and writes test classes that exercise 95% coverage of the new apex extension. change set deployment to production fails with the test coverage warning: "average test coverage across all apex classes and triggers is 74%, at least 75% test coverage is required."what can the developer do to successfully deploy the new visualforce page and extension?
a. create test classes to exercise the visualforce page markup
b. select "disable parallel apex testing" to run all the tests.
c. add test methods to existing test classes from previous deployments
d. select "fast deployment" to bypass running all the tests