Pease help me with the fallowing questions is been super difficult for me, I will appreciate if you could help. Thank you so much in advance!

Statistical techniques such as factor analysis and reliability analyses:

a. can help scale developers shorten the length of a scale and raise its reliability at the same time.

b. give scale developers insight into how many underlying dimensions or factors are measured by the scale.

c. can provide many different psychometric characteristics about a scale, including means, variances, and different measures of reliability.

d. All of the above.

A scale developer obtains an insignificant (near zero) correlation between a couple satisfaction scale and an intelligence test. S/he is happy with this result because it suggests that the couple satisfaction scale:

a. is internally consistent.

b lacks validity.

c. is unreliable.

d. possesses discriminant validity.