Which of These Conclusions Can Be Accurately Drawn for Frequencies

Which of these conclusions can be accurately drawn for frequencies used in ultrasound imaging?

A) When we use lower frequencies of ultrasound, we gain lower spatial resolution, and we can image to greater depth.
B) When we use higher frequencies of ultrasound, we gain lower spatial resolution, and we can image to greater depth.
C) When we use lower frequencies of ultrasound, we gain higher spatial resolution, and we can image to greater depth.
D) When we use higher frequencies of ultrasound, we gain higher spatial resolution, and we can image to greater depth.