How can you check if NO value was selected in a radiobuttonlist

Group of answer choices

a.check if the selectedindex = 0

b.check if the selectedindex >= 1

c.check if the .selectedvalue = 0

d.check if the selectedindex = -1

Flag question: Question 6

Question 61 pts

To clear out a selection made in a radiobuttonlist

Group of answer choices

a.set the .text property to Nothing

b.set the .text property to .text = Nothing

c.set the .selectedvalue property to = 0

d.set the .selectedIndex property to -1