Answer:
The sentence that is written in standard English is:
C. My grandmother made a really delicious pie for dessert.
Step-by-step explanation:
Standard English is a variety of English largely used by educated people. This variety has undergone severe regularization over the centuries, meaning grammar rules are properly observed. Slang words, for instance, are avoided, as well as regional dialects.
Among the sentences provided for analysis, the only one that is written in standard English is letter C. My grandmother made a really delicious pie for dessert. Even though the other sentences do not possess errors or mistakes, they use a "less scholarly" way to qualify something by employing words and phrases such as "epic", "awesome" and "off the hook".