What is a common characteristic of the letters A, B, D, and M when written in Italic?

The letters A, B, D, and M have a common characteristic when written in Italic: they are all multiple stroke letters. In Italic calligraphy, these letters typically require more than one stroke to create their distinct forms. For example, the letter A consists of strokes for the left diagonal, right diagonal, and crossbar; B consists of a vertical stroke and rounded forms for the bowls; D involves a vertical stroke and a rounded bowl; and M requires strokes for the vertical lines and additional strokes for the peaks.

In the context of calligraphy, recognizing the structure and stroke order of letters is crucial for proper execution and fluidity of writing. This characteristic sets them apart from single stroke letters, which can be formed with just one continuous motion, making them simpler in design.