连接到在另一台服务器上运行的Oracle数据库

Question

这就是情景。

We Have 4 Servers (A, B, C, D). 
Server A: runs Oracle DB and listener.
Server B: can connect(see) to server A.
Server C: can connect to server B but can't connect to server A.
Server D: can connect to server C but can't connect to servers (A, B) and runs SQLPLUS on it.

现在我想知道是否可以将服务器D上的SQLPLUS连接到通过服务器（B，C）在服务器A上运行的Oracle DB。