Mix letters, numbers and symbols
Use 8-9 characters
Use a different password for each online account(Maybe)
A quadrilateral which could be used to show that Ron's claim is false is a trapezoid.
<h3>What is a
quadrilateral?</h3>
A quadrilateral can be defined as a type of polygon that has four (4) sides, four (4) vertices, four (4) edges and four (4) angles.
<h3>The types of
quadrilateral.</h3>
In Geometry, there are different types of quadrilateral and these include the following:
Generally, the opposite sides of a trapezium is not congruent unlike the other quadrilaterals. Thus, a quadrilateral which could be used to show that Ron's claim is false is a trapezoid.
Read more on quadrilateral here: brainly.com/question/16691874
D.
A would be "How were they behaving..."
B would be "Are these books new?"
and C would be "Have the Robinsons..."
I believe the answer is movement, hope this helps