Question

35 is described under a Hebrew word, and refers to ladanum, a fragrant resin produced in Cyprus, and the use of this drug, as well as that of cinnamon and cassia, ______________ even at that early period, a knowledge of the products of Somaliland, Arabia and the East Indies.

Q: Answer-35 is described under a Hebrew word, and refers to ladanum, a fragrant resin produced in Cyprus, and...

Here, the subject is ladanum. So, a singular verb should b e used. B and C are singular verbs, but refers is inappropriate here. However, refers to must have been correct. The word indicate means to show, point, or make clear in another way. 35 is described under a Hebrew word, and refers to ladanum, a fragrant resin produced in Cyprus, and the use of this drug, as well as that of cinnamon and cassia, indicates even at that early period, a knowledge of the products of Somaliland, Arabia and the East Indies.