T9A02

Which of the following describes a type of antenna loading?

1. AElectrically lengthening by inserting inductors in radiating elements
2. BInserting a resistor in the radiating portion of the antenna to make it resonant
3. CInstalling a spring in the base of a mobile vertical antenna to make it more flexible
4. DStrengthening the radiating elements of a beam antenna to better resist wind damage

Pick an answer to check it.