The sentence which uses correct punctuation is C. In time, of course, all issues get resolved, but not necessarily in the way you would like.
In A, the comma before <em>he was concerned </em>should be a dash. In B, there should be a colon before <em>a flashlight, </em>not a semi colon. In D, there should be a comma before <em>yet, </em>and not a colon.
The woodpecker gave Hiawatha the secret to defeating his enemy.
Answer:
1) Kerry added <u>whey</u> to the pancake batter.
2) In Europe, many cooks and bakers <u>weigh</u> their ingredients to measure them
3) Do you know the <u>way</u> to the new supermarket?
4) Joe is going to make pancakes, he needs to find the way to the supermarket so he can buy his ingredients. He then needs to weight them. Later on he mixes all the ingredients to create a batter, and adds whey.