A nurse is preparing to test a client's plantar Babinski reflex. Which of the following instructions should the nurse give to prepare the client for this test?

The plantar Babinski reflex is assessed by stroking the sole of the foot from the heel toward the toes. A normal response is the flexion or curling of the toes. An abnormal response, known as a positive Babinski sign, is the extension and fanning out of the toes, which indicates an upper motor neuron lesion. "Place your foot in my hand and I will tap the back of your heel": This instruction is more relevant to testing the Achilles tendon reflex, where the nurse taps the back of the heel to elicit a plantarflexion response. "Sit on the edge of the bed while I tap your knee": This instruction is more relevant to testing the patellar reflex, also known as the knee-jerk reflex. The nurse taps the patellar tendon just below the kneecap to elicit a reflexive contraction of the quadriceps muscle. "Relax your arm across your chest and I will test your elbow extension": This instruction is more relevant to testing the triceps reflex, where the nurse taps the triceps tendon to elicit a reflexive extension of the elbow.