Concept:Solving jumbled sentences by identifying pronoun references and logical connections.
Explanation:S1 states that Britain was the first to industrialize.
The next sentence must connect to it.
Q begins with "It", which refers to Britain.
So Q is the first of the middle four.
Only option 1 (QPSR) starts with Q.
Q describes Britain's political stability and unification.
P follows logically: "This meant" refers to that unity, explaining common laws and single currency.
S comes next: by the late 17th century, money was widely used as a medium of exchange.
R then continues: "By then" refers to that same time period, noting a shift to wage income.
S6 concludes: this gave people more spending choices and expanded the market.
Thus the correct order is Q → P → S → R.
Answer:Option A (QPSR)