Which religious symbol was controversially incorporated into the original logo of the world's largest Christian publishing house, Zondervan, before being redesigned in the 1990s?

Throughout history, religious and philosophical symbols have been incorporated into corporate logos and brand identities, sometimes causing controversy or creating powerful brand recognition. This trivia tests your knowledge about the intersection of ancient spiritual symbols and modern brand strategy in the religious goods and services market. Can you identify which sacred symbol has been authentically adopted by which spiritual brand?

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The Chi Rho symbol (☧)
The Triquetra (Celtic trinity knot)
The Ankh (Egyptian cross)
The Ichthys (Jesus fish)