PBCH的DMRS密度是（）。

A.21.25–24.5GHz
B.22.25–25.5GHz
C.23.25–26.5GHz
D.24.25–27.5GHz

A.23.5–26.5GHz
B.24.5–27.5GHz
C.25.5–28.5GHz
D.26.5–29.5GHz

A.2196–2390MHz
B.2296–2490MHz
C.2396–2590MHz
D.2496–2690MHz