*Please no reposts, I need to understand what I am doing here*

In design of experiments, which of the following statement is correct? Resolution V+ design is better than full factorial design. In the 2x2 DOE, if the two lines cross each other, there is no interaction. In DOE, "interaction" means the input factor and output result are highly positively correlated A resolution V design provides more information than a resolution III design but is more expensive or time consuming