Shabreka Lopez,marketing Manager for Yaard-Vark Lawn Tractors,is Interested in the Relationship

Shabreka Lopez,marketing manager for Yaard-Vark Lawn Tractors,is interested in the relationship between the prices of lawn tractors and the level of sales.To test whether increasing prices will lead to a change in sales and how much of a change,she should use ________ research.

A) Causal
B) Descriptive
C) Random
D) Academic
E) Exploratory