4.PART A: Which statement best summarizes the 1950s attitude towards space colonization versus the modern view on colonizing other planets?AThe author argues that the reasoning behind space colonization in the 1950s was optimism, whereas now the motivation comes from distress and fear of the future. BThe author argues that the 1950s attitude towards space colonization was motivated by competition in the space race, but it is now prompted by ambition and greed. CThe author argues that the 1950s attitude towards space colonization was naive and unrealistic, whereas now it is pessimistic and desperate. DThe author argues that the reasoning behind space colonization in the 1950s was hope in the future, whereas now the motivation comes from a desire to return to the past.