HELP PLS FOR BRAINLIST

-The name of the story- "EXCERPT FROM THE WEDNESDAY WARS"-

Paragraph 6- "Gentlemen," he said, "though this is irregular, I have made some significant changes for the interior of the new junior high since my original submission. In fact the entire concept has changed markedly. So the plans that you studied for this afternoon's presentation have also changed. I have copies of the new interior plan and ask the board's patience as I show you the concept. This may take slightly longer than the allotted time, but I'm sure that the Chamber of Commerce Businessman of 1967 won't begrudge Kowalski and Associates a few extra minutes in order to clarify the proposal, and to promote the general business atmosphere of the town."...

In paragraph 6,"markedly" means doing something in?

A. an obvious way
B. a careful way
C. a respectful way
D. an enthusiastic way​