What should Isla write in the areas marked A, B, and C?

A: Has a longer wavelength
B: Can travel only through matter
C: Has a higher frequency

A: Has a higher frequency
B: Can travel only through matter
C: Has a longer wavelength

A: Has a higher frequency
B: Travels at the same speed
C: Has a longer wavelength

A: Has a longer wavelength
B: Travels at the same speed
C: Has a higher frequency

ANSWER IS THE SECOND SET

Radio waves: have a longer wavelength

X-rays: have a higher frequency

Both: they travel at the same speed

Explanation:

Missing part of the question:

"Isla made a diagram to compare x-rays and radio waves. what should isla write in the areas marked a, b, and c?"

X-rays and radio waves are both types of electromagnetic waves.

Electromagnetic waves consist of oscillations of the electric and the magnetic fields in a plane perpendicular to the direction of propagation the wave.

All electromagnetic waves travel in a vacuum always at the same speed, the speed of light:

Electromagnetic waves are also classified into 7 different types, according to their wavelength/frequency. From longest to shortest wavelength (and  from lowest to highest frequency, since frequency is inversely proportional to wavelength), they are:

Radio waves (>1 m)

Microwaves (1 mm - 1 m)

Infrared (750 nm - 1 mm)

Visible light (380 nm - 750 nm)

Ultraviolet (10 nm - 380 nm)

X-rays (0.01 nm - 10 nm)

Gamma rays (<0.01 nm)

Therefore, the correct matches are:

Radio waves: have a longer wavelength

X-rays: have a higher frequency

Both: they travel at the same speed