When the standard deviation of a normal distribution increases, the height decreases. What is the reason for this? Select all correct reasons.

With a larger s.d., the chance of finding a value close to the mean value decreases
The area under the normal distribution is a constant (viz. 1)
A larger s.d. decreases the central value of the distribution
This simply is not true: the height of the normal distrubution is unaffected by the s.d.