Which of the Following Best Characterizes an Angular Unconformity

Which of the following best characterizes an angular unconformity?

A) Horizontal lava flows lie below the unconformity, and horizontal, sedimentary strata lie above.
B) It is the discordant boundary between older strata and an intrusive body of granite.
C) Tilted strata lie below the unconformity with loose, unconsolidated soil above.
D) Tilted strata lie below the unconformity, and bedding in younger strata above is parallel to the unconformity.