20. What major development in the 20th century helped increase jerky productio a) The invention of the microwave b) Advances in food processing technology c) The boom of cattle ranching d) The discovery of artificial flavors

## Step 1<br />The question is asking about the major development in the 20th century that helped increase jerky production. Jerky is a type of dried meat product, and its production would logically be influenced by advancements in food processing technology. <br /><br />## Step 2<br />The invention of the microwave (option a) could have an impact on the speed of food preparation, but it doesn't directly increase the production of jerky. <br /><br />## Step 3<br />The boom of cattle ranching (option c) could potentially increase the availability of raw materials for jerky production, but it doesn't necessarily increase the production of jerky. <br /><br />## Step 4<br />The discovery of artificial flavors (option d) could enhance the taste of jerky, but it doesn't necessarily increase the production of jerky. <br /><br />## Step 5<br />Therefore, the most logical answer is option b, advances in food processing technology, as it would directly increase the production of jerky.