The correct statement is the length of the CD is 28 units.
What is a quadrilateral?
It is a polygon that has four sides and four corners. The sum of the internal angle is 360 degrees.
Given
Length AB = 3x + 1
Length AD = 4x
Length BC = 22
To find
The length CD.
How to find the length CD?
ABCD is a kite, we know that the adjacent sides are equal, that is
AB = BC
3x + 1 = 22
3x = 21
x = 7
Similarly
AD = CD
4x = CD
CD = 4(7)
CD = 28
Thus, the length of CD is 28 units.
More about the quadrilateral link is given below.
https://brainly.com/question/6321910