C
I agree, the earthly ark was only a:
Exodus 25:40 And see that thou make them after their pattern, which is being shown thee in the mount.
Hebrews 8:5 They serve at a sanctuary that is a copy and shadow of what is in heaven. This is why Moses was warned when he was about to build the tabernacle: "See to it that you make everything according to the pattern shown you on the mountain."