Which of the Following Is Not True Regarding ¹H NMR $\delta$

Which of the following is not true regarding ¹H NMR spectroscopy?

A) a "downfield" peak appears at a lower value of $\delta$
B) on a 300 MHz instrument, a proton that adsorbs irradiation at a frequency 900 Hz higher than the adsorption of TMS appears at $\delta$ 3 ppm.
C) " $\delta$ for a particular proton is independent of the magnetic field strength of the instrument used."
D) "deshielding" leads to peaks at higher values of $\delta$