A wholesaler buys pre-packed sugar in bags with an advertised mean weight of 5 kgs. He wishes to conduct a hypothesis test to check the validity of the advertised weight. Which of the following alternative hypotheses is appropriate?

a) Ha:= 5 kg (equal to)

b) Ha:5 kg (less than or equal to)

c) Ha: 5 kg (not equal to)

d) Ha:> 5 kg (greater than)