Answer:
a
The null hypothesis is

The alternative hypothesis is

b

c

d
There no sufficient evidence to conclude that 75% of adults say that it is morally wrong to not report all income on tax returns
Explanation:
From the question we are told that
The sample size is

The number that said it is morally wrong is

The level of significance is

The population proportion is

Generally the sample proportion is mathematically represented as

=>

=>

The null hypothesis is

The alternative hypothesis is

The standard error is mathematically represented as

=>

=>

Generally the test statistics is mathematically represented as

=>

=>

Generally the p-value is mathematically represented as

From the the z-table

=>

=>

From the calculation

Hence we fail to reject the null hypothesis
Thus there no sufficient evidence to conclude that 75% of adults say that it is morally wrong to not report all income on tax returns