Choose the correct option to complete the text below. A...

Choose the correct option to complete the text below.

A blockchain oracle is a device or entity that ____ a deterministic blockchain with off-chain data (data outside of the network). Blockchain oracles are essentially third-party services that provide smart contracts with externai information.

Blockchain oracles ____ as a bridge between blockchains and the outside world. They ____ it possible for smart contracts on blockchains to access off­ chain data.

Due to contractual agreements and other methods of key information needed by blockchain applications, it is often imperative to have relevant information from the outside world present to execute the agreement in question. This is the point where blockchain oracles ____ play.

(Adapted from http://makeuseof.com)