Which of the following breeds of cattle was originally red in color?

The Gelbvieh breed of cattle is known for its original reddish-gold color, which is a distinguishing characteristic of the breed. This breed originated in Germany and was primarily developed for its dual-purpose abilities, providing both milk and beef. Over the years, while various breeders have developed different color variations and strains, the foundation of the breed was indeed a red-tinted cattle.

The other breeds mentioned are notable for different characteristics. The Aberdeen Angus is primarily black or red, but it's often recognized for the black variation. Hereford cattle are famous for their white face and reddish body, but their origin isn’t strictly tied to being red; they are primarily recognized for their distinctive coloring. Brangus cattle, a hybrid between Brahman and Angus breeds, typically possess black or red coloring, but they are specifically bred for traits such as heat and insect resistance, rather than for original color.